Sandpiper Diaphragm Pump Repair Kiut. (4) Ball, check 2-3/4 BN. (4) Seat, check valve 2 BN. NEW in open OEM package. This item is in the category "Business & Industrial\Hydraulics, Pneumatics, Pumps & Plumbing\Pumps & Pump Accessories\Pump Parts & Accessories\Other Pump Parts & Accessories". The seller is "clearview917" and is located in this country: US. This item can be shipped worldwide.